Is Coral Calcium Expensive?

I have been reading a lot about Coral Calcium lately, and I have been thinking of trying it to see if it really is as good as they are claiming. However, I am not willing to spend all that much money in order to do this. Can anyone tell me whether or not these supplements are expensive? I am hoping that they don’t cost too much since I am kind of curious about them. I figure since they are vitamins it probably won’t hurt to try them, but I am going to do some research first to make sure there aren’t any complaints about them.